Eudialyte

Eudialyte is a very rare exclusive mineral of nepheline syenites and associated pegmatites. Eudialyte is named after the Greek "eu" - well and "dialytos" - soluble, indicating its easy solubility in acids.
Translucent to translucent red (pyrope-like) to reddish-brown eudialytes can occur either as crystals or in the form of solid grains. But nicely shaped crystals are very rare. The most famous sites of eudialytes can be found on the Kola Peninsula in Russia, as well as in Greenland, Norway and Canada.
Eudialyte is most often cut into cabochons and used in jewelery.